Island



( 2 Sheets-Sheet 1.-

E. O. MYRIOK 85 G. O. DOEG. ELECTRIC STOP MOTION FOR ENGINES.

No. 541,287. Patented June 18, 1895. v

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a 2 Sheets-fleet 2. E. G. MYRIOK 8v G. G. DOEG. ELEGTRIG STOP MOTION FOR ENGINES. 0. 541,287. Patented June 18, 1895;

, description thereof.

UNITED STATES I PATENT OFFICE.

EUGENE C. MYRICK AND GEORGE C. DOEG, OF PROVIDENCE, RHODE ISLAND.

ELECTRIC STOP-MOTION FOR ENGINES.

SPECIFICATION fonning part. of Letters Patent N 0. 541,287, dated June 18, 1895.

Application filed May 23,1893.

To all whmn it may concern:

Be it known that we, EUGENE G. MYRICK and GEORGE C. DOEG, of thercityand county of Providence, in the State of Rho'de Island, have invented certain new and useful Improvements in Electric Stop- Motions for Steam-Engines; and we do herebydeclare the following specification, taken in connection with the accompanying drawings, forming a part of the same, to be a full, clear, and exact The stop motion which forms the subject of the present invention is more particularly adapted for use upon steam engines which are provided with detachable valve gear and mechanism connected with and, controlled by the governor for eifecting the detachment of the valves.

The object of the invention is to provide efficient means for quickly stopping such a steam engine at a distance from the engine room, and also to provide efticient means for promptly stopping the engine automatically upon the happening of certain contingencies.

To that end one feature of invention consists in the combination, with the governor and the valve detaching mechanism, of m echanism connecting said governor and said valve detaching mechanism, said connecting mechanism being constructed in two parts detachably connected together, one of said parts being provided with an independently movable engaging device for engaging the other part, and carrying an electro-magnet and armature for operating said engaging device to disconnect the two parts of said connecting mechanism.

The invention further consists in the combination, with the governor and valve detaching mechanism, of mechanism connecting said governor and said valve detaching mechanism, said connecting mechanism being constructed in two parts detachably connected together, and means for automatically disconnecting the parts of said connecting mechanism through an .electric circuit; by the abnormal movement of some part of the engine, as for instance of the governor or of the cylinder head.

The invention further consists in certain other combinations and arrangements of parts hereinafter described.

Serial Ne. 475,276. (No model.)

Referring to thedrawings, Figure l is an elevation of so much of a steam-engine as is necessary for an understanding of the present invention. Figs. 2 to 6, inclusive, are detail views, upon an enlarged scale, of certain of the parts which willbe more fully hereinafter explained.

The engine shown in the drawings is of the Corliss type, embodying rotary cut-off valves and one of the more recent forms of the Corliss valve operating and detaching mechanism. It. is to be understood, however, that the features of invention hereinafter described are not limited to any particular form or type of engine, but may be applied to any engine provided with detachable valve gear,whether horizontal or vertical, stationary or marine.

A represents an oscillating or swinging frame pivoted at a and to be operated in the usual manner by an eccentric upon the main shaft of the engine connected to said swinging frame at a for giving the proper movements to the steam and exhaust valves of the cyl-' inder. The arms a a of the swinging frame A are.connected by means of links I) to the crank arms b. which operate the exhaust valves. The arms a a of the swinging frame are connected by means of links b to the crank arms b which operate the steam valves. As will be understood, the crank arms b are not permanently connected with the steam valves, but are detachably connected therewith through a suitable latch connection, and so that the valves may be unlatched and disconnected from the arms b before the completion of their throw, and quickly closed by weights working in the dash-pots c. The time of unlatching and thus disconnecting the steam valves from the arms which operate them is automatically regulated by the position of the governor acting through proper connecting mechanism to vary the position of the detaching mechanism, or in some other suitable way.

Heretofore the mechanism connecting the governor with the cut-0E mechanism in an engine of the type shownin the drawings has consisted of a T-lever suitably pivoted upon the frame-work, the long arm of which was connected with and operated by the governor sleeve d, and from the short arms of which extended connecting rods e, 6, connecting said ICO short arms of said T-lever with the pivoted levers e, e, the opposite ends of which were connected with the partsfif, which serve to effect the unlatching of the latches g, g, the combination being such that as the governorsleeve rose and fell under the action of the governor balls, the T-lever would be oscillated, and thereby through the connecting rods ethe position of the parts f would be automatically regulated and determined.

In the present invention there is no change in the detaching mechanism, the latches g, the partsf, and the connecting rods 6, being all constructed and arranged precisely as before. Instead, however, of connecting the rods 6, e, to the governor sleeve d through the intervention of a T-lever constructed of a single part or piece with the three arms thereof formed integral, said T-levenis constructed in effect in two parts adapted to be detachably connected together, one of said parts embodying the long arm 72, which is connected to the governor sleeve, and the other part embodying the two short arms h, h, to which the rods 6, e, are respectively connected. The two parts of said T-lever are normallycon nected together so as to in effect form one piece, and so as to operate in the same manner as the T-lever with its arms integral formerly employed. When the engine is to be stopped, however, in any of the ways hereinafter described, the two parts of the T-lever are to be disconnected as hereinafter eX- plained.

To the part which embodies the short arms h, h, is secured an arm k upon which is adjustably mounted a weight h which may be held in any adjusted position by means of the set-screw It. \Vheneverthe two parts of the T-lever are disconnected, the weight it will act to turn the part embodying the arms h, h, in the direction indicated by the arrows, Fig. 1. This movement of the arms h, h will by means of the rods e, e, and the levers e, e, serve to move the parts fin'to such position that they will serve either to prevent altogether the engagementof the latches g, g, or to cause said latches to be disengaged before the lap of the valves has been overcome, in either of which cases the valves will not be opened, no steam will be admitted to the cylinder, and the engine will be stopped. The different ways for effecting the disconnection of the two parts of the T-lever will now be described. This disconnection is to be effected by the closing of an electric circuit, which circuit may be closed either by hand or automatically. That part of the T lever which embodies the arm his provided with a hub 7L4 mounted upon the end of the fixed stud i so as to turn freely thereou,said stud 11 being secured to the frame of the engine. That partof the T-lever which embodies the arms h, h, is provided with a hub 71 which is mounted upon the hub 71 so as to turn freely thereon when permitted to do so, said hub it being provided with an annular flange h forming a sort of cup or inclosure, all as shown in Fig. 3. In the bottom of the cup so formed is arranged a circular plate or disk It, said disk being mounted upon a prolongation of the hub k and being secured to said lar pulleys 18. The pulleys on which the hub by means of screws k, k, as shown in said Fig. 3. Said disk is provided with grooves 73, 70 to receive studs 15 projecting from the hub h said grooves 10 being arranged as shown'in Fig. 5, said Fig. 5 being a face view, and Fig. 6 an edge View, of said disk. To the disk 7c is secured a bracket 10 supporting an electromagnet E, and also another bracket 10 supporting the armature Z of said electromagnet. Secured to the armature Z so as to be operated thereby is a bolt m arranged to slide in the bracket Wand adapted to entera corresponding hole or recess a formed in the annular flange 71 and 0 As will be seen, when the holt'm is in .engagemeut with the recess 11, the two parts of the T-lever will be securely locked together, and will oscillate together under the action of the governor sleeve as the governor balls rise and fall, the same as though the several arms of the T-lever were formed integral as heretofore. Vhen, however, the bolt m is withdrawn from the recess 12, the two parts will be unlocked ordisconnected, and so that the part embodying the arms h, 72., will be free to be turned upon the hub h under the action of the weight h thereby moving the arms It, h, the levers e, e, and the parts f, f, into such position as to eifect the stopping of the engine as above explained. The studs 10 working in the slots 10 of the disk 70, serve to limit the motion of the parts.

It will be further seen that whenever the electroeinagnet E is energized so as to attract its armature Z, the bolt m will be withdrawn from the recess n. Then the engine is to be stopped, therefore, all that is necessary is to all as indicated in Figs. 2

energize said'electro-magnet by the passage of a current through its coils by the closing of an electric circuit connected therewith. This circuit may be closed, as above stated, either by hand orautomatically. From the coils of the electro-ma-gnet E the wires 2, 2, extend to the binding posts 6, 6, secured to, but insulated from, the plate It, and from the binding posts 6, 6, the wires 2, 2, may be carried to any desired distance from the engine, the circuit including a battery B or other source of electricity, and a push-button or other circuit closing device 0. Ifdesired, branch circuits may extend to the ditferent rooms of the establishment where the engine is located, each branch being provided with apush-button or circuit closing device, and so that if it be desired to stop the engine promptly from anyof said rooms, it willonly be necessary to push the button.

For thepurpose of stopping the engine automatically when the governor balls shall rise or fall beyond predetermined limits,'the"following mechanism may be employed: Upon the rear of the hub h of that part of the T- lever which carries the arms 71', h, are secured two contact plates 19, p, insulated from said hub, and an intermediate plate p of insulat-- ing material, such as a piece of hard rubber, as shown in Fig. 4. Secured to the pivot 1', but insulatedtherefrom, is a bracket '1', carrying a pivoted or swinging arm 0".

The swinging arm 1' and the plates 19,19, constitute an automatic circuit closing device. The circuit to be closed by said device may consist as before of a pair of wires 2 2, and the battery B. \Vhen, however, it is desired to employ said automatic governor-operated circuit-closing device in connection with the hand operated circuit-c1osing device 0, the circuit for said automatic circuitcloser is completed by the employment of an extra or additional wire 5 extending from one of the binding posts 6 to one pole of the battery, in a break in which said wire 5 the automatic circuit closer above described is located. Thus one section of the wire 5 extends from the battery B to the bracket 1', while the other section of the wire 5 extends from one of the binding posts 6 to the contact plates 19, p, as shown in Fig. 3, the bracket 0" and arm 1" completing this portion of the circuit. The other side of the circuit is formed by one of the wires 2 extending from the other binding post 6 to the other pole of the battery.

The swinging arm 7" is arranged, when-in the position shown in Fig. 3, so as to be in contact with one or the other of the plates 19,19, or with the piece of insulating material p, as the case may be, the arrangement of the parts being such that as long as the governor balls do not rise or fall beyond the predetermined limits the arm 7" will be in contact with the piece of insulating material 19, and so that the electric circuit will be open, and the two parts of the T-lever will remain locked together and operate to regulate the cut-off mechanism the same as though made in one piece. If, however, the governor balls should fall below the predetermined limit, as for instance, by reasonof the breaking of the governor belt, the governor sleeve will descend so far as to cause, through the arm h, the connected parts of the T-lever to be turned or swung so far that the piece of insulating materialp will be carried out from under the arm 1' and so that one of the contact pieces 1) will be carried under and into contact with the arm 0", thereby automatically closing the circuit and promptly stopping the engine. So also if the governor balls should rise beyond the predetermined limit, as for instance by the racing of the engine from any cause, the governor sleeve will rise so far as to cause the connected parts of the T-lever to be swung so far in the opposite direction that the piece of insulating material 1) will likewise be carried out from under the arm 'r' and the other contact piece 13 carried under and into con- -tures of our invention.

tact with said arm, and thus automatically close the circuit and stop the engine.

It is very desirable to promptly stop the engine in case of any movement of the cylinder head., This may be readily accomplished automatically in the following manner: To the cylinder head 3 is secured an annular plate if, said plate being insulated from said cylinder head. To the cylinder casing is secured another annular plate arranged to extend over the plate t,-as shown in Fig. 1. Branch wires 3, 3, extending from the circuit wires 2,2, are connected one to the plate 15 and one to the plate ii. If now the cylinder head should at any time start from its seat, such movement of the cylinder head would serve to bring the plate t into contact with the plate 25, thereby closing the circuit and promptly stopping the engine. c

As will be seen, the employment of the construction and arrangementof parts above described, in which the mechanism which connects the governor with the valve detaching mechanism embodies a T-lever constructed in two parts detachably connected together,

necessitates very little change in that large class of steam engines in which the one-part T-lever is embodied in said connecting mechanism, involving only the substitution for the one-part T-lever heretofore employed of a two-part T-lever with its electric connection.

' By the employment of such two-part T-lever,

also, our invention may bereadily applied by .the same simple substitution to any existing.

engine of the class referred to. While for these reasons we prefer the construction embodying such twopart T-lever, we wish it to be understood that we do not limit our invention to the employment of such two-part T- lever. Thus it is evident that other constructions and arrangements of parts may be employed which would still embody mechanism constructed .in two parts detachably connected together, with one of said parts provided with an independently movable engaging device for engaging the other part, and

carrying an electro-magnet and its armature for operating said engaging device to disconnect the two parts of said connecting mechanism, and which constitutes one. of the fea- So also it is evident that various constructions and arrangements of mechanism for connecting the governor and the valve detaching mechanism with the said connecting mechanism constructed in two parts detachably connected together may be employed in combination with an electriccircuit and means for automatically closing the same to effect the disconnection of the parts upon the happening of some contin gency, without departing from the spirit of that feature of our invention which consists in the combination with the governor and valve detaching mechanism of a two-part connecting mechanism and means for automatically disconnecting the parts of said connecting mechanism through an electric circuit by an abnormal movement of some part of the engine, as for instance of the governor or of the cylinder head.

It will also be understood that the mechanism for automatically closing the electric circuit may be likewise varied, and we do not wish to limit ourselves to the particular mechanism shown and described.

WVhat we claim as our invention, and desire to secure by Letters Patent, is

1. The combination, with the governor and the valve detaching mechanism, of mechanism connecting said governor and said valve detaching mechanism, said connecting mechanism being constructed in two parts detachably connected together, one of said parts being provided with an independently movable engaging device for engaging theother part and carrying an electro-magnet and its armature for operating sa'id engaging device to disconnect the two parts of said connecting mechanism, substantially as described.

2. The combination, with the governor and the valve detaching mechanism, of mechanism connecting said governor and said valve detaching mechanism, said connecting mechanism being constructed in two parts detachably connected together, one of said parts being provided with an independently movable engagingdevice for engaging the other part, and carrying an electro-magnet and its arma ture for operating said engaging device to disconnect the parts, an electric circuit for energizing said electro-magnet, and a circuit closing device for closing said electric circuit, substantially as described.

3. The combination, with the governor and the valve detaching mechanism, of mechanism for connecting said governor and said valve detaching mechanism, said connecting mechanism being constructed in two parts detachably connected together, and means for automatically disconnecting the parts of said connecting mechanism through an electric circuit by the abnormal movement of some part of the engine, substantially as described.

t. The combination, with the governor and the valve detaching mechanism, of 1nechanism connecting said governor and said valve detaching mechanism,said connecting mechanism being constructed in two parts detachably connected together, an electric circuit the closing of which will serve to disconnect the two parts of said connecting mechanism, means for moving the valve detaching mechanism independent of the governor when the parts of said connecting mechanism are disconnected, and a circuit closing device operated by the governor for automatically closing said electric circuit when the governor is moved beyond a predetermined limit, substantially as described.

5. The combination, with the governor and the valve detaching mechanism, of mechanism connecting said governor and said valve detaching mechanism, said connecting mech anism being constructed in two parts detachably-connected together, an electric circuit the closing of which will serve to disconnect the two parts of said connecting mechanism, and suitable electric connections whereby said electric circuit may be closed either by hand or automatically by the abnormal movement.

of some part of the engine, substantially as described.

6. The combination with the overnor and the valve detaching mechanism, of a lever connected to and operated by the governor, a

second lever detachably connected to said first lever, and also connected to and adapted to operate the valve detaching mechanism,

plate of insulating material, a contact piece secured to a fixed part of the engine, and an electro-magnet and its armature secured to 7 one of said levers, whereby as the detachably connected levers are oscillated under the action of the governor, said contact piece will, as long as the movements of the governor are within predetermined limits, ride upon the plate of insulating material, but will, when the governor is moved in either direction be yond said limits, be brought into contact with one or the other of said contact plates and thereby close an electric circuit to energize said electro magnet to effect the disconnection of the two levers, substantially as described.

EUGENE O. MYRIOK. GEORGE C. DOEG.- \Vitnesses:

W. H. THURSTON, S. J. MURPHY. 

